1. Represents the number of shares that were acquired upon conversion of Class B Common Stock to Class A Common Stock in connection with the net settlement of restricted stock units (the "RSUs") listed in Table II, based on a price of $21.115 per share, which represented the closing price of the issuer's Class A Common Stock on October 31, 2012.

2. Each RSU represents a contingent right to receive 1 share of the issuer's Class B Common Stock upon settlement.

3. The RSUs were granted with both (a) a liquidity event-based vesting condition and (b) a service-based vesting condition, both of which conditions must be satisfied in order for the RSUs to vest. Pursuant to the terms of the RSU award, the service-based vesting condition was satisfied as to 1/5th of the total number of shares on November 1, 2009 and then 1/60th of the total number of shares vest monthly thereafter, subject to continued service through each vesting date. The liquidity event-based vesting condition is satisfied six months after the issuer's initial public offering, which was declared effective on May 17, 2012. Under settlement procedures applicable to the RSUs, the issuer is permitted to deliver the underlying shares within 30 days before or after the date on which the liquidity event-based condition is satisfied.

4. The Class B Common Stock is convertible into the issuer's Class A Common Stock on a 1-for-1 basis (a) at the holder's option or (b) upon certain transfers of such shares, and has no expiration date.

5. Represents shares of Class B Common Stock that have been withheld by the issuer to satisfy its income tax withholding and remittance obligations in connection with the net settlement of the RSUs and does not represent a sale by the reporting person.

6. Represents shares of Class B Common Stock that have been converted to Class A Common Stock in connection with the net settlement of the RSUs.

7. The RSUs were granted with both (a) a liquidity event-based vesting condition and (b) a service-based vesting condition, both of which conditions must be satisfied in order for the RSUs to vest. Pursuant to the terms of the RSU award, the service-based vesting condition was satisfied as to 1/5th of the total number of shares on September 1, 2009 and then 1/60th of the total number of shares vest monthly thereafter, subject to continued service through each vesting date. The liquidity event-based vesting condition is satisfied six months after the issuer's initial public offering, which was declared effective on May 17, 2012. Under settlement procedures applicable to the RSUs, the issuer is permitted to deliver the underlying shares within 30 days before or after the date on which the liquidity event-based condition is satisfied.

Remarks:

/s/ Michael Johnson as attorney-in-fact for Michael T. Schroepfer

11/02/2012

** Signature of Reporting Person

Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person,
see
Instruction
4
(b)(v).